Concentration and ppm Calculations

The video tutorial covers the concept of concentration, explaining the formula C = M/V and its units. It introduces the triangle method for solving concentration problems and provides a practice question. The tutorial also explains parts per million (PPM) calculations and percent concentration, including conversions between units. Examples are provided to illustrate each concept, and students are encouraged to practice independently.

What is the formula for concentration in terms of mass and volume?

• C = V-M

• C = M/V

• C = M*V

• C = V/M

In the concentration formula C = M/V, what units should mass and volume be in?

• Grams and milliliters

• Kilograms and milliliters

• Grams and liters

• Milligrams and liters

When using the triangle method to solve for mass, what operation do you perform with concentration and volume?

• Division

• Multiplication

• Subtraction

• Addition

If you have 50 grams of salt in 2 liters of water, what is the concentration in grams per liter?

• 25 grams per liter

• 20 grams per liter

• 35 grams per liter

• 30 grams per liter

What is the unit for parts per million (ppm) concentration?

• Milligrams per liter

• Micrograms per liter

• Grams per liter

• Kilograms per liter

How do you convert 0.05 grams to milligrams?

• Multiply by 1000

• Multiply by 10000

• Multiply by 10

• Multiply by 100

What is the ppm concentration if you have 50 milligrams in 0.25 liters?

• 100 ppm

• 250 ppm

• 150 ppm

• 200 ppm

How do you express a percent concentration in terms of grams and milliliters?

• Grams per 10 milliliters

• Grams per 50 milliliters

• Grams per 1000 milliliters

• Grams per 100 milliliters

What is the ppm equivalent of a 0.05% concentration?

• 400 ppm

• 450 ppm

• 500 ppm

• 550 ppm

What is the first step in converting a percent concentration to ppm?

• Convert milliliters to liters

• Convert liters to milliliters

• Convert grams to milligrams

• Convert grams to kilograms